Typewriter line lock and margin release



Jan. 12, 1932. M. GARBELL TYPEWRITER LINE LOCK AND MARGIN RELEASE Filed Oct. 28, 1927 4 Sheets-Sheet ,Zweni'or:

Jan. 12, 1932. M. GARBELL TYPEWRITER LINE LOCK AND MARGIN RELEASE Filed Oct, 28, 1927 4 Sheets-Sheet o w o n o 1.

0m 1 ow E Jan. 12, 1932. M. GARBELL TYPEWRITER LINE LOCK AND MARGIN RELEASE Filed Oct. 28 1927- 4 Sheets-Sheet fivenfor:

4 Sheets-Sheet Jane 12, 1932. GARBELL TYPEWRITER LINE LOCK AND MARGIN RELEASE Filed Oct. 28, 1927 witness: MM

Patented Jan. 12, 1932 UNITED STATES PATENT OFFICE MAX GARBELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO VICTOR ADDING MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS TY PEWRITER LINE LOCK AND MAB/GIN RELEASE Application filed October 28, 1927. Serial No. 229,436.

'5 directed to the provision of such mechanism as will cause the line lock to be positive in action and so operate on the members to be locked that the liability of damage, due to improper handling of the typewriter, will be eliminated.

Furthermore, I provide a margin releasing device in combination with my aforesaid line locking mechanism which may be operated to release or nullify the line looking more than one time. In other words, the line lock is operated, whereafter the margin may be released for the printing of one or more strokes, the line lock is again operated, and finally the aforesaid lock may be againreleased. Such a progressive series of incidents results in maximum safety and permits the printing of one or two additional strokes when desired. It further has the important function that a careless release of the side locking will not permit an adverse effect on the writing being done by allowing the same to be carried to the edge of the paper. After the usual one or two strokes are made, either to complete a syllable or place a hyphen, the machine again 80 locks and must be released again, so that the operator has a maximum number of warnings of the approach of the paper edge.

Again the mechanism, which I hereafter describe more in detail, is novel in its provision of a two-way margin release, in that the designated release key will release the margin at either the left or the right as distinguished from the usual release at one side only. The

combination of sucha two-way release withthe other features of my invention produces very marked advantages.

Moreover, the above mechanism is so arranged that the aforesaid progressive events are produced in a very simple and satisfactory manner with a minimum number of partsinthe combination. I have also illustrated my invention in combination with the platen described in my copending application Serial No. 29,334, filed May 11, 1925-.

It is no easy matter to associate a desirable and successful line locking mechanism and margin release with a carriage having the characteristics described in said copending application, and, as I will hereinafter point out, the elements of my invention are so arranged that they operate in highly successful unity with the aforesaid pivotally mounted carriage.

My invention will be better understood by reference to the accompanying drawings, in which:

Figure 1 is a perspective View of a number of the elements of my invention showing the manner in which they are utilized in a typewriting machine;

Fig. 2 is an elevational sectional view of the rear of a typewriter embodying my invention;

Fig. 3 is a fragmentary perspective view of one element of my invention;

Fig. 4 is a fragmentary elevational view of a number of the elements of my invention, the same being in the position occupied just as the margin stop at the side has contacted with the line lock;

Fig. 5 shows the margin stop and the engageable line lock member immediately after the first margin release;

Fig. 6 illustrates the position of the elements after the margin stop has contacted the second time with the line lock device;

Fig. 7 is an elevational cross-sectional view of the connection between the margin release key and the line locking mechanism;

Fig. 8 is a side elevational sectional view illustrating the movement whereby the line lock release or margin release key is moved to release the lock;

Fig. 9 is a similar view showing how the margin rack may be tilted about its longitudinal axis to release the margin lock; and

Fig. 10 is an elevational, sectional view of a number of the elements of my machine, the same being taken along a line extending fore and aft of said machine.

Referring now more particularly to the drawings, I show a typewriter machine comprising a frame port-ion '10 in which a platen 11, secured between end frames 121 2, is pivotally shiftable about a shaft 13. The

aforesaid end frames 1212 are secured to shaft 13 which is pivotally mounted as best shown in Fig. 2) in the side walls of the machine.

The aforesaid carriage assembly and upper rail 14 carrying the platen 11 is constantly urged to the right (as viewed from the rear in Fig. 2) by a (5011 spring 11a seatedin a housing 11?) and attached to a cord 110, which latter cord is secured to a pin 11d extending from the side plate 12.

The platen 11 is adapted to be shifted by the engagement of a shift key 17 with the lifter arm 18, which arm 18 is integral with arm16, the two comprising a bell crank, as best shown in Fig. 10. i

A typebar 19 is pivotally mounted to be moved to and from the platen 11 and is 0perated through the engagement of teeth 20 thereof with teeth 21 on the outward and upwardly extending portion 22 of an intermediate lever 23. Said lever 23 is pivotally mounted at 24 in a segment 25 and is provided with a slot 26 in which the upper end of a key lever extension 27 is positioned. A key lever 28 is pivotally mounted at 29 in comb 30, which comb or pivotal mounting assembly is described in my copending application Serial No. 209,672, filed August 1, 1927. Said key lever 28 is adapted to be moved downwardly about said pivot 29 against the action of spring 31 and is provided with a lug 32 which extends vertically of the slots in a comb 33 thereby producing a desirable long bearingfor the key lever 28 as it moves vertically.

The type action produced by the interrelation of the levers just described is set forth more in detail in my copending application Serial No. 720,255, filed June 16, 1924. A paper table 34 is secured in the carriage assembly and paper holding fingers. 35 are associated with a rod 36, this feature being more fully described in my copending application Serial No. 229,438, filed October 28, 1927.

An escapement rack 37 and a margin stop rack 38 are likewise mounted on two arms 39- 39 having finger engageable pieces 39a-39a at their upper ends, which arms are carried on a pivotal mounting so that movement thereof by engagement of the fingers will move said racks substantially perpendicularly to theback of the machine. Margin stops 40-441 are positioned on said rack 38 and are adapted to be moved therealong in the manner more fully described in my copending application Serial No. 191,576, filed May 16, 1927.

Pivotally mounted stop lugs 42 extend downwardly from the margin stops 40 and 41 and are adapted to engage a portion of the line lock mechanism when the carriage is 3939 of the rack 38 with its adjustable margin stops 40 and 41 thereupon alfords a very simple construction permitting the release of the rack from an escapement wheel 37 a, 1

said combination being particularly advantageous in that it permits the rack 37 to be swung sidewise rather than up and down with the attendant benefits of such operation,

particularly-as far as prevents the wear of the rack teeth from affecting operation. This combination of rack and escapement wheel is more fully described in my copending applications Serial No. 25,491, filed April 24, 1925 and Serial No. 229,439, filed October 28, 1927.

As best shown in Figs. 1, 3 and 4, a bracket 43 is mounted on the platen shift shaft 13, said bracket comprising two arms 44 and 45 which extend downwardly and are rolled around the shaft 13 at 46 and 47 respectively to produce a journal about which the bracket 43 may be moved. The bracket 43 is resiliently held in fixed position by the combina tion of a slot 48 in the journalled portion 46 (see Fig. said slot 48 being wider than the diameter of apin 49 fixed in said shaft 13 between the sides of the slot 48, so that the limits of movement are determined by the engagement of the sides of the slot with said pin 49. Moreover, a spring 50 extends between the upper end of the pin 49 and the arm 44 so that the bracket is automatically returnable to desired position through the action of said spring, pin, and slot.

Said bracket 43 is provided with a portion 51 extending along the shaft 13 and integrally formed with the arm 45, the left-hand end of the part 51 (see Fig. 4) being developed into a bearing or journal portion 52 and a downwardly extending part 53.

A- margin release key 54 is positioned at the front of the machine and when depressed moves a margin release lever 55 around its pivotal mounting so that it oscillates one arm 56 of a bellcrank which is pivoted at 57 in a channel member 58 extending across the frame of the machine. 7

Another arm 59 carries a push rod 60, the outer end of the'latter bearing against the part 53, as best seen in Fig.- 7.- When, therefore, margin release key 54 is depressed the push rod 60 moves the part 53 outwardly and serves to tilt thebracket 43 in towards the back of the machine against the action of spring 50, for purposes to be hereinafter more fully described.

The arm 45 of the bracket 43 carries a bell ringing crank 61 which is limited in one direction of movement by a lug 62. The stop member 42 contacts with the upper end of the bell crank 61 to raise the clapper 63, and after passing over the same, permits said clapper to drop into engagement with, and ring, bell 64.

An arm 65 is pivotally mounted at 66 on the bracket 43 so that it may swing parallel to the face of said bracket 43. The upper end of said arm (hereinafter termed the lock arm 65) is. separated into two lugs or engageable portions which partially embrace an extension 67 at the point where the arms 4445 of the bracket 43- come together. I have designated said partially embracing arms 68 and 69 andit will be noted particularly that the arm 69 swings across in front of the extension 67 so that the upper end of the arm 65 is guided and positioned when said arm 65 is moved. The lower end of the arm 65 is turned outwardly at 70 and a member 71 is attached thereto. Said member 71 is connected to one arm 72 of a bell crank 73 pivoted as shown in Fig.1. The other arm 74 of said bell crank is normally restrained by a spring 75, the bell crank 73 and the associated spring being mounted on a channel member 76 forming a part of the frame of the machine.

A locking member 77 is carried on arms 7 87 8, which arms are pivotally mounted at 79-79 in the frame of the machine. A connecting member 80 extends from said arms 78 to the outer end of said arm 74 of bell crank 73 so that when said bell crank arm 74 is moved in a clockwise direction (see Fig.

'1) the member 80 rotates the arms 787 8 about their pivots 7979 and shifts said L shaped locking member 77 to the position shown in dotted lines in Fig. 10, with its long dimension substantially perpendicularly disposed under the key levers.

I have so arranged the member 77 that when itis shifted to locking position it rests against the bearing portions 32-on the key levers thereby insuring a positive and rigid lock which is not prone to move about and result in damage to the machine.

Referring now to Figs. 4, and 6 for a better understanding of the progressive incidents of the operation of my improved lock mechanism and margin release, Fig. 4 illustrates the position of the elements just after the stop 42'has contacted with the arm 38. This engagementoperates to swing the lIIH 65 around the pivotpoint 66, it being ioted that the said arm 68 contacts with the extension 67 to positively and rigidly limit the progressive movement of the stop 42. [n this connection, reference should be had to Fig. 5 which shows the arm 65 in normal gosition before. the stop 42 has contacted herewith. When the elements are in the po- ;ition shown in Fig. 5, the locking bar 77 s in its lowered position, and the other elenents are in corresponding relation.

When, however, the contact of the stop 42 against arm 68 swings the bottom end of the arm 65 (see Fig. 4), the resultant movement of member 71 rotates the bell crank 7 3-to pull the member 80 backwardly thereby raising the member 77 and shifting it sufficiently over its center so that it stands with its longer leg vertical to prevent a suflicient downward movement of the key levers 28 to produce a printing stroke ofthe type bars 19. So long as the arm 65 is maintained in the position shown in Fig. 4 through the engagement of the stop 42 with portion 68, this line lock is effective to prevent printing strokes.

,lVhen now it is desired to nullify the line lock, or as it is known in the typewriter art to release the margin, the key 54 is pressed downwardly which results in the rod pushing against the portion 53 which shifts the bracket 43 towards the back of the machine, or as in Fig. 4, in towards the plane of the paper, which moves the arm 68 inwardly and away from the stop 42. The spring 75 then functions to pull the bottom of the arm to the right with the result that the member 68 is moved to the left of the-member 42. At the same time spring 50, assuming that the margin release key has been allowed to return to normal position, rotates the bracket 43 about the shaft 13 and again places the arms 68 and 69 in the same plane as that in which stop 42 moves which will, of course, result in the arm 69 being in the path of said stop 42, should the latter be again progressed to the right (see Fig. 5).

I have shown approximately one space between the arms 68 and 69 but this, of course, may be varied in accordance with conditions.

One or two spaces are of advantage, since P it is usually desirable that this much latitude p be allowed after the margin has been released although a preliminary alarmof the approach of the edge of the paper has already been given by the ringing of the bell 64 which, if observed, would indicate approximately 4 to 8 spaces before the line lock operates. Assume, however, that the typist continues to strike the keys. The portion 42 then contacts with arm 69 and again swings the lower end of the arm 65 to the left with the result that the line'locking mechanism again operates. Thereafter the margin release key may be again depressed with the result above described again to restore the parts so that this'time the arm 69 is to the left of the stop 42, whereafter the typing may be continued to the extreme edge of the platen.

There is no limit to which the number of successive stops and releases may be carried and this is one particular advantage of the combination just described; that is, that the parts are so disposed and so designed that any number of progressive locks and releases may be arranged without departing from the stead of the arms 68 and the carriage be moved too far ter field is one in which my improved combination finds particular use. One of the particular advantages incident to the positioning of the margin bar38 on the arms 39-39 as shown is that the margins may be released by movement of the arms and rack bar as well as'through the use of the line lock release key. This is a marked improvement over the old method and, as I have described, is one which is only obtained through the use of a combination such as set forth. In other words, the construction is such that the margins may he jumped either one space at a time or all together by movement of the rack bar out of engagement with the lockingarms 68 and 69; that is, in-

69 being moved away from the stop 42 while the latter is standing still, the stop 42 is moved away from said arms while the latter themselves are stationary, the manner of moving said rack being best shown in Fig. 9.

It will moreover be observed that the stop on member 41 will engage the lug 65a should to the right but here also the margin maybe released by pressing the key 54 and moving the bracket 4:3 and consequently arm'65 and stop lug 65a be within the limit and scope of my'invention,

' gin stop member comprising out'of the way. Said left-hand margin stop may also be released by moving the margin rack 38 to shift said stop 41 away from the stop lug 65a.

While I have described but one embodiment of my improved line locking mechanism and the means for releasing the same, ,it is apparent that those skilled in the art may depart from the exact showing herein and still and I desire, therefore, that said invention be limited only by the scope of the prior art and the appended claims.

I claim:

1. Ina linelock and margin release mechanism fortypewriters, acarriage-carrie'd martwo relatively movable portions, key levers, a line lock member normally positioned in the path of one of said portions'of-said' margin stop member and operable by engagement therewith durm letter-feeding movement of the carriage bu t unaffected by such engagement during reverse movement of the carriage due to relative movement of said portions of said margin stop member, said line lock member being mounted for movement transversely of the plane of said margin stop member for release of said margin stop member and comprising a double lock allowing an initial release, a subsequent printing stroke of the key levers, and finally another look and release.

2. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop member comprising two relatively movable portions, means en ageable by one of said portions of said mem er and movable transversely of the plane of said member to efi'ect release from such engagement, key levers, and a line lock member operated by said engageable means during letter-feeding movement of the carriage to a position to obstruct the downward movement of said key levers but unafiected by such engagement during reverse movement of the carriage due to relative movement of said portions of said nargin stop member, said line lock member comprising a double lock allowing an initial release, a subsequent printing stroke of the key levers, and finally another look and reease. A a a 3. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop membercomprising two relatively movable portions, key levers, a line lock mem ber normally positioned in the path of one of said portions of said margin stop member and operable by engagement therewith during letter-feeding movement of the carriage but unaffected by such engagement during reverse movement of the carriage due to relative movement of said portions of said margin stop member, said line lock member being mounted for movement transversely of said margin stop member for release of said margin stop member and comprising a double lock allowing an initial release, a subsequent printing stroke of the key levers, and finally another look and release, and a margin release key operable from the front of the machine to move said line look member out of engagement with said margin stop member after each of said locks.

4. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop member comprising two relatively movable portions, key-levers, a line lock mem- .ber normally positioned in the path of one of said portions of said margin stop member and operable by engagement therewith during letter-feeding movement of'the carriage but unaffected by such engagement during reverse movement of the carriages due to relative movement of said portions of said margin stop member, said line'lock member being mounted for movement transversely of said margin stop member for release of said mar gin stop inember and comprising a double lock allowing an initial release, a subsequent printing stroke of the key levers, and finally another lock and release, and a margin release key operable from the front of the machine to move said line lock member out of en gagement with said margin stop member after each of said locks, said line lock member being resiliently mounted to return sai'd double lock member to normal obstructing 1position after each operation of said release 5. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop member comprising two relatively movable portions, key levers, and a line loc mechanism operable by the engagement of one of said portions of said margin stop therewith during letter-feeding movement of the carriage but unaffected by such engagement during reverse movement of the carriage due to relative movement of said portions of said margin stop member, said line lock mecha nism comprising a bar shiftable to obstruct the downward movement of the key levers, a bracket member mounted for movement around its longitudinal axis and having an upwardly extending arm. a lock member pivotally mounted on said bracket so that the upper end of said member is moved parallel to the direction of carriage-member movement upon engagement of the margin stoptherewith while the lower end-of said member is moved to shift said bar to lever obstructing position, and means comprising a margin release key and a member operable thereby to swing said bracket and said lock member out of engagement with said stop, said lock member being provided with a plurality of locking portions to progressively obstruct said stop as said carriage is moved, and being resilient-- gin stop member comprising two relatively movable portions, key levers, and a line look mechanism operable by the engagement of one of said portions of said margin stop there with during letter-feeding movement of the carriage but unafi'ected by such engagement during reverse movement of the carriage due to relative movement of said portions of said margin stop member, said line lock mechanism comprising a bar shiftable to obstruct the downward movement of the key levers, a bracket member mounted for movement around its longitudinal axis and having an "ment upon engagement of the margin stop therewithwhile the lower end of said member is moved to shift said bar to lever obstructing position, and means comprising a margin release key and a member operable thereby to swing said bracket and said lock member out of engagement with said stop, said lock member being provided with a plurality of looking portions to progressively obstruct said stop as said carriage is moved, and being resiliently controlled to return said first 0bstructing portion to normal non-locking position and to set up the next locking portion in the path of said stop when said bracket is moved, and to thereafter return said second obstructing portion to normal position behind the stop to permit further lever printing movements.

' 7. In a line lock and margin release mecha- .nism for typewriters, a carriage-carried margin stop member comprising two relat vely movable portions, key levers, and a line lock mechanism operable by the engagement of one of said portions of said margin stop there with during letter-feeding movement of the carriage but unaffected by such engagement during reverse movement of the carriage due to relative movement of said portions of said margin stop member, said line lock mechanism comprising a bar shiftable to obstruct the downward movement of the key levers, a bracket member mounted for movement around its longitudinal axis and having an upwardly extending arm, a lock member piv otally' mounted on said bracket so that the upper end of said member ismoved parallel to the direction of carriage-member movement upon engagement of the margin stop therewith while the lower end of said mem her is moved to shift said bar to lever obstructing position, and means comprising a margin release key and a member operable thereby to swing said bracket and said lock member out of engagement with said stop, the upper end of said lock member cooperating with said bracket arm, and being pro vided with two obstructing portions which progressively engage said stop and which are disengaged therefrom by the margin release movement of said bracket.

8. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop member, key levers, and a line lock mechanism operable by the engagement of said margin stop therewith comprising a bar shiftable to obstruct the downward -movement of the key levers, a bracket member mounted for movement around its longiarm, and being provided with two obstructlng portions which progressively engage said stop and which are disengaged therefrom by v of the arm upon first margin release,

9. Ina line lock and margin release mechanism for typewriters, a carriage pivotally mounted on a shaft for case shifting, a margin stop member on said carriage, key levers, and a line lock mechanism operable by the engagement of said margin stop therewith comprising a bar shiftable to obstruct the downward movement of the key lever, a bracket member mounted for movementaround its longitudinal axis and having an upwardly extending arm, a lock member pivotally mounted on said bracket so that upper end of said member is moved parallel to the direction of carriage-member movement upon engagement of the margin stop therewith while the lower end of said memberis moved to shift said bar to lever obstructing position, said bracket being-mounted on the case-shift tilting shaft of said carriage to be moved independently of said carriage shift movements and having an engageable portion extending therefrom, and a margin release mechanism comprising a key and a rod operable thereby to engage said portion to swing to bracket about said shaft.

10. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop member, key levers, and a line lock mechanism operable by the engagement of said margin stop therewith comprising a bar shiftable to obstruct the downward movement of the key levers, a bracket member mounted for movement around its longitudinal axis and having an upwardly extending arm, a lock member pivotally mounted on said bracket so that upper end of said member is moved parallel to the direc-' tion of carriage-member movement upon engagement of the margin stop therewith while the lower end of said member is moved to shift said bar to lever obstructing position, said bracket being mounted on the case-shift tilting shaft of said carriage to be moved independently of said carriage shift movements and having an engageable portion extending downwardly therefrom, and a margin release mechanism comprising a mar in release key lever and a bell crank mova is thereby, one arm of said crank engaging perpendicularly against said bracket portion to swing to bracket about said shaft.

11. In 2" line lock and margin release mechanism for typewriters, a carriage-carried margin stop member, key levers, and a line lock mechanism operable by the engagement of said margin stop therewith comprising a bar shiftable to obstruct the downward movement of the key levers, a 'sbraeket member mounted for movement around its longitudinal axis and having an upwardly extending arm, a lock member pivotally mounted on said bracket so that upper end of said member is moved parallel to; the direction of carriage-member movement upon engagement of the mar in stop therewith while the lower end of sai member is moved to shift said bar to lever obstructing position, said bracketbeing mounted on the caseshift tilting shaft of said carriage to be moved independently of said carriage shift movements and; having an engageabl'e portion extending downwardly therefrom, and a margin release mechanism comprising a margin release key lever pivoted-intermediate its ends, a bell crank, one arm ofwhich is movable by said margin release by lever and the other end of which moves said bracket to swing to bracket about said shaft.

12. In a line lock and margin release mechanism for typewriters, a carriage-carried margin stop member, key levers, and a line lock mechanism operable by the engagement of said margin stop therewithcomprising a bar shiftable to obstruct the downward movement of the key levers, a bracket member mounted for movement around it's longitudinal axis and having anupwardly extending arm, alock member pivotally mounted on said bracket so that upper end of said member is moved parallel to the direction of carriage-member 'movement upon engagement of the margin stop therewith while the lower end ofsaid. member is moved to shift said'bar to lever obstructing position, said bracket'bein'g mounted on the case-shift tilting shaft of said carriage to be moved independently of said carria e shift movements and having an engagea le portion extending downwardly therefrom, and a margin release mechanism comprising a margin release, key lever pivoted intermediate its ends, a bell crank, one arm of which is movable by said margin release by lever and a push rod attached to the other arm and adapted to engage substantially perpendicularly against said downwardly extending bracket portion to move said bracket and release said margin stop to swing to bracket about said shaft.

In witness whereof, I have hereunto subscribed my name.

MAX GARBELL. 

